Surfacing roller for road facings



Dec. 16, 1941. A. a.. NAGET SUHFACING ROLLER FOR ROAD FACINGS 6 Sheets-Sheet l DEIIJDIII Filed June 16, v1939 Dec. 16, 1941. A. L. NAGET SURFACING ROLLER FOR ROAD FACINGS 6 Sheets-Sheet 2 Filed June 16, 1959 IrwnZZr v 24774901? Dec. 16, 1941.

Filed June 16, 1939 A. L. NAGET SURFACING ROLLER FOR ROAD FACINGS 6 Shets-Sheet 3 Pic-3.2.

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SURFACING ROLLER FOR ROAD FACINGS Filed June 16, 1939 6 Sheets-Sheet 5 Dec. 16, 1941. A. L. NAGET SURFACING ROLLER FOR ROAD FACINGS Filed June 16, 1959 e Sheets -Sheet s fzwenzr Z. W096i Jam EYE/ M 9 Patented Dec. 16,

SURFACING ROLLER FOR ROAD FACINGS Adolphe Lon Naget, Le Cannet, France Application June 16, 1939, Serial No. 279,573

- In Morocco June 23, 1938 3 Claims.

The present invention relates to a roller for' road surfaces, of the type of those comprising in particular a roller of great length and of small diameter which freely rotates about-a shaft resting on bearings secured to the rollerand supporting a frame on which are mounted the means for imparting the rotary movement to the roller.

It will readily be understood that when it is thus driven, the roller develops a force of inertia, the direction of which is such that it offer a reaction to the driving means mounted .on the frame, which reaction tends to cause said frame to rotate about the roller.

One of the objects of the present invention is to provide rollers of this type with balancing means which considerably decrease this reaction force, thereby balancing the frame and the drivroller.

These various objects and other advantages are obtained by means of particular arrange- ,ments which are the objects of the present in- .vention and which will be described in detail with reference to the accompanying drawings which show, diagrammatically and merely by.

way of example, various embodiments of the invention. I g

In said drawings: T Fig. 1 is a front elevation of the left hand part of a roller provided with an adjustable and manually engageable balancing counterweight according to the invention.

v Fig. 4 is a side elevation of the opposite end to that shown in the elevation of Fig. 2.

for automatically controlling the position of the balancing counterweight.

The surfacing roller comprises, as shown in Figs. 1, 1a and 2, a finishing roller l of great length and of small diameter. Said roller is adapted to rotate freely about a shaft 2 to which is secured a frame 3 which carries the various controlling and operating members for the apparatus. On said frame is mounted, in the first place, the motor 4, on the shaft of which is fixed a pulley 5 which drives a speed reducer ID of any appropriate type through an appropriate reversing gear 6, I. Said reducer is adapted to impart at reduced speed, by means of its pinion ll, of the chain l4 and of the pinion IS, the desired rotary movement-to the roller I about its shaft 2.

According to the invention, the surfacing rollers of the above described type are provided with a levelling rod adapted to level the coating which has been previously spread over the road.

. Said levelling rod 43 is carried, at each of its ends, by a support 10 adapted to swing freely about the corresponding end" of the shaft 2 of the roller. Said rod 43 rests on race bars such as H (Figs. 1, 1a, 2, 3 and 4) arranged on the road. Said rod 43 is adapted to move with a reciprocating motion relatively to the supports 10 transversely to the race bars: for this purpose, each of said supports is provided with a bolt 12 engaged in a slot 13 of the rod. The support 10 of one of the ends of the rod carries the mechanism for imparting the reciprocating motion to said rod. According to the embodiment shown in Figs. 3 and 4, said mechanism comprises a sprocket wheel 14 which is mountedat the end of the roller and actuates a sprocket pinion 15 (Fig. 4), on the spindle 16 of which is fixed a bevel pinion Tl meshing with another pinion 18, the spindle 19 of which carries a pinion driving another pinion 80a secured to a plate 30b provided with a crank-pin 8| on which is mounted a connecting rod 82, the other end of which isconnected to a bolt 83 fixed on the rod which thus receives the desired reciprocating Fig. 5 a longitudinal section showing the details of the manual engaging meansfor the balancing counterweight;

I Figs.-6 to 9 show elevations of said engaging means in the various position it may occupy.

Figs. 10 and 11 show, very diagrammatically,

1 respectively front and side elevations of a method it sufllces to swing the supports 10 about the shaft of the roller. The whole of the actuating mechanism swings with the support 10 and the levelling rod 43 is urged against the race bars ll, merely with its weight, the weight of supports IQ, and the weight of said actuating mechanism.

In order to bring the rod- 43 into the inoperative position, 7

As more particularly shown in Fig. 1a, a clutch system could advantageously be provided on the outer part of the shaft I6. Said clutch, which is generally designated by I and which may be of an appropriate known type, enables-the reciprocating motion of the levelling rod 43 to be stopped at will during the travel of the roller.

It is moreover quite obvious that this method which has just been described for imparting the reciprocating motion to the rod is only given by way of example and that a large number of equivalent devices could be imagined which would enable said reciprocating motion to be imparted by the roller I itself, or even directly by the motor 4.

In order to effect, in successive sections, the finishing of a road surface with the roller which has just been described, two transverse bars or races II are arranged on the road for the first section, said bars or races being spaced apart a slightly greater distance than the length of the roller. The ends of the levelling rod rest on said bars between which the roller travels. Under these conditions, when the roller is started, the rod begins by levelling the previously' spread coating to the height of the race bars; the roller then effects the desired compression of said coating. It will be observed that the sawing movement which is given the rod 43 considerably facilitates -the levelling of the coating.

After effecting the first section, the adjacent marginal edge of same acts as arace bar: it is thus only necessary to arrange a single bar for,

rotary move-.

ment of the roller I was imparted by a motor 4 mounted on the frame 3. If no balancing de- The present invention covers a balancing device which overcomes this drawback. According to this device, the details of which are shown in Figs. 5 to 9, the shaft 2 of the roller I carries a counterweight I6 shaped like a quadrant. 0n n ethe other hand, said shaft 2 is not constantly secured to the frame 3. (in the contrary, it is adapted to rotate freely reatively to said frame, but it' can however be securedto same by means of a special arrangement which comprises in particular an engaging member 60 which is adapted to pivot about a journal 6I carried by the frame ing moment to the reaction developed by the motor forthe direction of travel in question.

When it is desired to make the apparatus travel in the opposite direction, the counterweighthas-to be brought into the position which is symmetrical to the one shown in Fig. 6, that is to say into the position shown in Fig. 9. For this purpose, the operator moves the lever 63 from right to left. He then brings the engaging member into the position shown in Fig. 7 in which its catch 66 is released from the notch 68 whereas its other catch 65 has come into contact 'with the periphery of the part 69. At this inwhich corresponds to the direction of travel shown by the arrow FI.

Thus by means of a very simple arrangement, a rational balance of the reaction developed by the actuating members is obtained. Of course, the actuating lever 63 can move opposite any member which enables it to be locked in one or other of the two positions it is adapted to occupy.

In Figs. 10 and 11, a modification of thebale ancing device, has been shown. According to this modification, which enables balancing to be made entirely automatic without the operators having to effect any operation, the counterweight I6 remains secured to the shaft 2 on which the motor 4 is freely mounted, whereas the reducer III is made to rotate integral with said shaft 2.

In this manner, when the motor 4 drives the roller I, the speed reducer III tends to rotate but in its movement it carries with it the counterweight I6 until the latter is automatically placed in the position in which it balances the reaction developed by the driving movement of the roller I.

' In Fig. 11 the three possible positions for the 3. The pivoting of said member maybe conv trolled by means of a system of levers 62- -63,

the fixed spindle 64 of said system being likewise carried by the frame. The engaging member is shaped like a fork and has two catches -66 adapted to co-operate with two notches 6I68 carried by a part 69 fast on the shaft 2 of the roller. i

In the position shown in Fig. 6, the engaging member is in the position in which the apparatus moves forwards in the direction of the arrow F. In this position, it is its catch 66 which is v engaged in the notch 68, so that when the frame is substantially horizontal (position shown in reducer I0 have been shown, viz, the position IIla which is the inoperative position, the position IOb which is the position taken up-by the reducer during the movement of the roller in an opposite direction. A roller is thusobtained in which the reaction is automatically and completely balanced in both directions of travel without the intervention of the operator.

While I have illustrated and described the preferred form of construction for carrying my in vention into effect, this is capable of variation and modification, without. departing from the spirit of the invention. I therefore do not wish to be limited to the precise details of construction set forth, but desire to avail myself of such variations and modifications as come within the scope of the appended claims.

I claim:

1. A roller for road surfaces adapted to travel between forms arranged on the road, comprising a roller. a'shaft about which said roller is adapted to rotate freely, a frame carried by said shaft, driving means mounted on said frame and adapted to impart a rotary movement to said roller, a support'freely mounted on each end of said shaft, a leveling rod arranged in front of the roller and supported at its ends by said supports, said levelling rod being adapted to move with a reciprocating motion relatively to said support, and driving mechanism mounted on one of said supports for imparting said reciprocating motion to said levelling rod, and counterbalancing means carried by said roller adapted to urge said levelling rod against the forms merely by its Weight, the weight of said two supports and the weight of said mechanism.

2. A roller according to claim 1, in which the frame supporting driving means is freely mounted on the roller shaft and receives a reaction when the driving means impart a rotary movement to the ,roller, comprising a speed reducer interposed between said driving means and said roller, the frame of said reducer being fixed to the roller shaft, and. a counter-weight shaped like a quadrant fast on the roller shaft; whereby the said reaction causes a slight rotary movement of the shaft and consequently of the counter-weight and of the reducer, until a position is reached in which the balance is automatically obtained.

3. A roller according to claim 1, in which the frame supporting driving means is freely mounted on the roller shaft and receives a reaction when the driving means impart a rotary movement to the roller shaft, comprising a counterweight shaped like a quadrant on the roller shaft, a member having two notches fast on the roller shaft, an engaging member having two catches and adapted to pivot on said frame, and a system of levers for controlling the angular position of said engaging member, whereby either of said two catches can be brought into engagement with one of said two notches, the roller shaft being thus enabled to be secured to said frame in two different positions which each corresponds to one direction of travel of the apparatus and in which the counterweight offers the highest balancing moment to the said reaction.

ADOLPI-IE LEON NAGE'I. 

